Fix PIC default to be -fPIC

-fPIC is more restrictive than -fPIE, but when "-fPIC -fPIE" used together
the latter overrides. It may lead to issues when building DSO where
-fPIC and not -fPIE is required.

For executables -fPIE -pie shoudld be added and it's fine to override
-fPIC as it is done now.

The reason why we don't have these issues so far is probably related to
-Bsymbolic added by default. But any attempt to remove it reveals these
problems:
https://android-review.googlesource.com/#/c/98061/

Change-Id: If0f10628b7cc41e564221a7a37298f7d65f859a8
Signed-off-by: Pavel Chupin <pavel.v.chupin@intel.com>
diff --git a/core/combo/TARGET_linux-x86.mk b/core/combo/TARGET_linux-x86.mk
index bc13fb9..960c58a 100644
--- a/core/combo/TARGET_linux-x86.mk
+++ b/core/combo/TARGET_linux-x86.mk
@@ -112,7 +112,7 @@
 			-Werror=format-security \
 			-D_FORTIFY_SOURCE=2 \
 			-Wstrict-aliasing=2 \
-			-fPIC -fPIE \
+			-fPIC \
 			-ffunction-sections \
 			-finline-functions \
 			-finline-limit=300 \